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powerpc: allow PPC_EARLY_DEBUG_CPM only when SERIAL_CPM=y 

In a randconfig with CONFIG_SERIAL_CPM=m and
CONFIG_PPC_EARLY_DEBUG_CPM=y, there is a build error:
ERROR: modpost: "udbg_putc" [drivers/tty/serial/cpm_uart/cpm_uart.ko] undefined!

Prevent the build error by allowing PPC_EARLY_DEBUG_CPM only when
SERIAL_CPM=y.

Fixes: c374e00e17 ("[POWERPC] Add early debug console for CPM serial ports.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230701054714.30512-1-rdunlap@infradead.org
This commit is contained in:
Randy Dunlap 2023-06-30 22:47:12 -07:00 committed by Michael Ellerman
parent d8b0bd57c2
commit 39f4968403
1 changed files with 1 additions and 1 deletions
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arch/powerpc/Kconfig.debug
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@ -240,7 +240,7 @@ config PPC_EARLY_DEBUG_40x
config PPC_EARLY_DEBUG_CPM
bool "Early serial debugging for Freescale CPM-based serial ports"
depends on SERIAL_CPM
depends on SERIAL_CPM=y
help
Select this to enable early debugging for Freescale chips
using a CPM-based serial port. This assumes that the bootwrapper